JP3434104B2 - Superconducting accelerator - Google Patents
Superconducting acceleratorInfo
- Publication number
- JP3434104B2 JP3434104B2 JP28172995A JP28172995A JP3434104B2 JP 3434104 B2 JP3434104 B2 JP 3434104B2 JP 28172995 A JP28172995 A JP 28172995A JP 28172995 A JP28172995 A JP 28172995A JP 3434104 B2 JP3434104 B2 JP 3434104B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- input coupler
- liquid helium
- pipe
- accelerating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000001307 helium Substances 0.000 claims description 36
- 229910052734 helium Inorganic materials 0.000 claims description 36
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 2
- SWQJXJOGLNCZEY-BJUDXGSMSA-N helium-3 atom Chemical compound [3He] SWQJXJOGLNCZEY-BJUDXGSMSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Landscapes
- Particle Accelerators (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、荷電粒子ビーム加
速器システムに使用する超伝導加速器に関する。
【０００２】
【従来の技術】従来、入力結合器の冷却を備えた液体ヘ
リウム槽を有する超伝導加速器としては、図２及び図３
に示すものが知られている。ここで、図２は超伝導加速
器の全体図、図３は図２の超伝導加速器の一構成である
入力結合器の説明図である。
【０００３】図２中の符番21は超伝導加速空洞であり、
液体ヘリウム槽22内に配置されている。前記超伝導加速
空洞21の外周には、超伝導加速空洞21を極低温に冷却す
るための冷媒である液体ヘリウム23が満たされている。
前記超伝導加速空洞21内には、入力結合器24により投入
された電力によって加速される荷電粒子ビーム（例えば
電子25）が存在する。前記入力結合器24は、図３に示す
如く、液体ヘリウム26が蒸発して発生したヘリウムガス
27によって自然対流にて冷却される構造になっている。
なお、図２中の符番28は真空槽である。
【０００４】
【発明が解決しようとする課題】ところで、従来の超伝
導加速器では、入力結合器24を液体ヘリウム槽22から蒸
発するヘリウムガス27の自然対流によって冷却してい
た。そのため、冷却の温度調整ができておらず、入力結
合器24の冷えすぎによるリークの原因となる霜の発生
や、冷却不足による侵入熱量の増大から起因するランニ
ングコストの増加という恐れがあった。
【０００５】また、入力結合器24を装置上部に配置する
必要があった。そのため、装置の大型化につながり、高
さの限られた場所での超伝導加速器の設置に労力が費や
されていた。更に、入力結合器24を超伝導加速器に取り
付け，交換する際、高所作業という問題があった。
【０００６】本発明はこうした事情を考慮してなされた
もので、蒸発したヘリウムガスを液体ヘリウム槽から配
管を通じて入力結合器に導き、入力結合器の回りに巻き
付け、冷却し、その先に流量調整弁を取り付けること
で、入力結合気の過冷却装置の信頼性低下や冷却不足に
よるランニングコストの増加を解消し、また任意の箇所
に入力結合器を取り付けることができ、設置条件を易し
くせる超音波加速器を提供することを目的とする。
【０００７】
【課題を解決するための手段】本発明は、荷電粒子ビー
ムを加速する超伝導加速空洞と、この超伝導加速空洞を
極低温に冷却し、液体ヘリウムを超伝導加速空洞の外周
に満たし、極低温状態を保持する液体ヘリウム槽と、荷
電粒子ビームを加速するための電力を供給するための入
力結合器と、この入力結合器に巻き付けられ、前記液体
ヘリウム槽から蒸発したヘリウムガスを入力結合器まで
導いて該入力結合器を冷却する配管と、この配管の先に
取り付けられた流量調整弁及び排気ポンプとを具備する
ことを特徴とする超伝導加速器である。
【０００８】本発明においては、液体ヘリウム槽から蒸
発したヘリウムガスを配管を通じ、発熱体である入力結
合器を冷却し、その先にヘリウムガスの流量を調整する
流量調整弁及び蒸発したヘリウムガスを排気する排気ポ
ンプを取り付けることで、ヘリウムガスの流量が調整で
き、冷却温度を調整することができる。その結果、液体
ヘリウム槽への熱負荷が低減でき、また過冷却によるク
ライオスタットへのリークの原因となる霜付着を防止で
きる。更に、配管による冷却方法を採用することで、入
力結合器の取付場所に自由度が与えられ、建家，導波管
に合わせて、インプットカプラの取り付け位置を決める
ことができる。
【０００９】
【発明の実施の形態】以下、本発明の一実施例を図１を
参照して説明する。図中の符番１は、荷電粒子ビーム２
を加速する超伝導加速空洞である。この超伝導加速空洞
１の周りには、液体ヘリウム３が充填されている。ま
た、超伝導加速空洞１の外側には、液体ヘリウム３を保
持し，超伝導加速空洞１を超伝導状態に保つため液体ヘ
リウム槽４が配置されている。
【００１０】前記超伝導加速空洞１には、荷電粒子ビー
ム２を加速するための電力を供給するポートとしての入
力結合器５が連通されている。この入力結合器５には、
一端が前記超伝導加速空洞１に連通された配管６が巻き
付けられている。前記入力結合器５に巻き付けられた配
管６には液体ヘリウム槽４から蒸発したヘリウムガス７
が導かれ、ヘリウムガス７により入力結合器５を冷却す
るようになっている。前記配管６の他端側には、流量調
整弁８及び排気ポンプ９が順次介装されている。前記超
伝導加速空洞１，入力結合器５等は真空槽10により囲ま
れ、熱侵入を防ぐようになっている。
【００１１】上記実施例に係る超伝導加速器によれば、
入力結合器５に配管６を巻き付け、この配管６に液体ヘ
リウム槽４から蒸発したヘリウムガス７を送って配管６
を通じて入力結合器５の冷却を行なうため、入力結合器
５の取付場所を任意に設定できる。また、流量調整弁８
及び排気ポンプ９を配管６の他端に介装させることによ
り、冷却に使用するヘリウムガス７の流量を調整でき、
過冷却や冷却不足を防止できる。
【００１２】
【発明の効果】以上詳述したように本発明によれば、蒸
発したヘリウムガスを液体ヘリウム槽から配管を通じて
入力結合器に導き、入力結合器の回りに巻き付け、冷却
し、その先に流量調整弁，排気ポンプを取り付けること
で、液体ヘリウム槽への熱負荷低減によるランニングコ
ストの低減，過冷却防止でのクライスタットへの霜付着
防止による装置信頼性の向上、そして外部設備（建家，
導波管）に合った小型の超伝導加速器の設計が可能にな
る。また、入力結合器の取付位置を自由に設定できるた
め、組立，交換が容易になる。更に、小型の超伝導加速
器を設計することができるので、装置製作の上でのコス
トダウンを図ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting accelerator used in a charged particle beam accelerator system. 2. Description of the Related Art Conventionally, as a superconducting accelerator having a liquid helium tank provided with cooling of an input coupler, FIGS.
The following are known. Here, FIG. 2 is an overall view of the superconducting accelerator, and FIG. 3 is an explanatory diagram of an input coupler which is one configuration of the superconducting accelerator of FIG. [0003] Reference numeral 21 in FIG. 2 is a superconducting accelerating cavity,
It is arranged in the liquid helium tank 22. The outer periphery of the superconducting acceleration cavity 21 is filled with liquid helium 23, which is a coolant for cooling the superconducting acceleration cavity 21 to an extremely low temperature.
In the superconducting accelerating cavity 21, there is a charged particle beam (for example, electrons 25) that is accelerated by the power supplied by the input coupler 24. The input coupler 24 is, as shown in FIG. 3, a helium gas generated by evaporating the liquid helium 26.
The structure is cooled by natural convection by 27.
Reference numeral 28 in FIG. 2 denotes a vacuum chamber. [0004] In the conventional superconducting accelerator, the input coupler 24 is cooled by natural convection of the helium gas 27 evaporating from the liquid helium tank 22. For this reason, the cooling temperature cannot be adjusted, and there is a risk that frost which may cause a leak due to excessive cooling of the input coupler 24 and an increase in the amount of heat entering due to insufficient cooling may increase the running cost. In addition, it is necessary to arrange the input coupler 24 at the upper part of the device. This has led to an increase in the size of the apparatus, and labor has been spent on installing the superconducting accelerator in a place where the height is limited. Further, when the input coupler 24 is attached to the superconducting accelerator and replaced, there is a problem of working at a high place. The present invention has been made in view of the above circumstances, and guides evaporated helium gas from a liquid helium tank to an input coupler through a pipe, winds around the input coupler, cools, and then adjusts the flow rate. By installing a valve, it is possible to eliminate the deterioration of the reliability of the supercooling device for the input coupling air and the increase in running cost due to insufficient cooling. It is intended to provide an accelerator. SUMMARY OF THE INVENTION The present invention provides a superconducting accelerating cavity for accelerating a charged particle beam, cooling the superconducting accelerating cavity to a very low temperature, and depositing liquid helium on the outer periphery of the superconducting accelerating cavity. A liquid helium tank that fills and maintains a cryogenic state, an input coupler for supplying power for accelerating the charged particle beam, and a helium gas wound around the input coupler and evaporated from the liquid helium tank. A superconducting accelerator comprising: a pipe that leads to an input coupler to cool the input coupler; and a flow control valve and an exhaust pump attached to a tip of the pipe. In the present invention, the helium gas evaporated from the liquid helium tank is passed through a pipe to cool the input coupler, which is a heating element, and a flow rate adjusting valve for adjusting the flow rate of the helium gas and a helium gas evaporated therefrom. By attaching an exhaust pump for exhausting air, the flow rate of helium gas can be adjusted, and the cooling temperature can be adjusted. As a result, the heat load on the liquid helium tank can be reduced, and the adhesion of frost, which causes leakage to the cryostat due to overcooling, can be prevented. Further, by adopting a cooling method using piping, the mounting location of the input coupler is given a degree of freedom, and the mounting position of the input coupler can be determined according to the building and the waveguide. An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 in the figure denotes a charged particle beam 2
Is a superconducting accelerating cavity that accelerates Liquid helium 3 is filled around the superconducting acceleration cavity 1. A liquid helium tank 4 is arranged outside the superconducting acceleration cavity 1 for holding the liquid helium 3 and keeping the superconducting acceleration cavity 1 in a superconducting state. An input coupler 5 serving as a port for supplying electric power for accelerating the charged particle beam 2 is connected to the superconducting acceleration cavity 1. This input coupler 5 includes:
A pipe 6 whose one end communicates with the superconducting acceleration cavity 1 is wound. Helium gas 7 evaporated from the liquid helium tank 4 is provided in a pipe 6 wound around the input coupler 5.
And the input coupler 5 is cooled by the helium gas 7. A flow regulating valve 8 and an exhaust pump 9 are sequentially provided at the other end of the pipe 6. The superconducting accelerating cavity 1, the input coupler 5 and the like are surrounded by a vacuum chamber 10 to prevent heat intrusion. According to the superconducting accelerator according to the above embodiment,
A pipe 6 is wound around the input coupler 5, and helium gas 7 evaporated from the liquid helium tank 4 is sent to the pipe 6 so that the pipe 6
The cooling of the input coupler 5 is performed through the above, so that the mounting place of the input coupler 5 can be set arbitrarily. In addition, the flow control valve 8
By interposing the exhaust pump 9 at the other end of the pipe 6, the flow rate of the helium gas 7 used for cooling can be adjusted,
Overcooling and insufficient cooling can be prevented. As described in detail above, according to the present invention, the evaporated helium gas is led from the liquid helium tank to the input coupler through a pipe, wound around the input coupler, cooled, and then cooled. By attaching a flow control valve and an exhaust pump to the tank, the running cost is reduced by reducing the heat load on the liquid helium tank, the equipment reliability is improved by preventing frost from adhering to the cryostat to prevent overcooling, and the external equipment (building House,
It is possible to design a small superconducting accelerator suitable for a waveguide. In addition, since the mounting position of the input coupler can be freely set, assembly and replacement are facilitated. Furthermore, since a small superconducting accelerator can be designed, cost reduction in device fabrication can be achieved.
【図面の簡単な説明】
【図１】本発明の一実施例に係る超伝導加速器の説明
図。
【図２】従来の超伝導加速器の説明図。
【図３】図２の超伝導加速器の一構成である入力結合器
の説明図。
【符号の説明】
１…超伝導加速器、 ２…荷電粒子ビーム、３…
液体ヘリウム、 ４…液体ヘリウム槽、５…入力
結合器、 ６…配管、７…ヘリウムガス、
８…流量調整弁、９…排気ポンプ、 10…
真空槽。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a superconducting accelerator according to one embodiment of the present invention. FIG. 2 is an explanatory diagram of a conventional superconducting accelerator. FIG. 3 is an explanatory diagram of an input coupler which is one configuration of the superconducting accelerator of FIG. 2; [Explanation of symbols] 1 ... superconducting accelerator, 2 ... charged particle beam, 3 ...
Liquid helium, 4 ... liquid helium tank, 5 ... input coupler, 6 ... piping, 7 ... helium gas,
8 ... Flow control valve, 9 ... Exhaust pump, 10 ...
Vacuum chamber.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−245198（ＪＰ，Ａ) 特開 平３−4927（ＪＰ，Ａ) 特開 平３−208300（ＪＰ，Ａ) 特開 平９−7796（ＪＰ，Ａ) 特開 平７−245199（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05H 7/20 ZAA ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-245198 (JP, A) JP-A-3-4927 (JP, A) JP-A-3-208300 (JP, A) JP-A-9-99 7796 (JP, A) JP-A-7-245199 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H05H 7/20 ZAA
Claims (1)
洞と、この超伝導加速空洞を極低温に冷却し、液体ヘリ
ウムを超伝導加速空洞の外周に満たし、極低温状態を保
持する液体ヘリウム槽と、荷電粒子ビームを加速するた
めの電力を供給するための入力結合器と、この入力結合
器に巻き付けられ、前記液体ヘリウム槽から蒸発したヘ
リウムガスを入力結合器まで導いて該入力結合器を冷却
する配管と、この配管の先に取り付けられた流量調整弁
及び排気ポンプとを具備することを特徴とする超伝導加
速器。(57) Claims 1. A superconducting accelerating cavity for accelerating a charged particle beam, cooling the superconducting accelerating cavity to cryogenic temperature, filling liquid helium around the superconducting accelerating cavity, A liquid helium tank that maintains a cryogenic state, an input coupler for supplying electric power for accelerating the charged particle beam, and a helium gas wound around the input coupler and evaporated from the liquid helium tank is input coupled. 1. A superconducting accelerator comprising: a pipe for guiding an input coupler to a cooling device; and a flow control valve and an exhaust pump attached to a tip of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28172995A JP3434104B2 (en) | 1995-10-30 | 1995-10-30 | Superconducting accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28172995A JP3434104B2 (en) | 1995-10-30 | 1995-10-30 | Superconducting accelerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09129399A JPH09129399A (en) | 1997-05-16 |
| JP3434104B2 true JP3434104B2 (en) | 2003-08-04 |
Family
ID=17643175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28172995A Expired - Lifetime JP3434104B2 (en) | 1995-10-30 | 1995-10-30 | Superconducting accelerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3434104B2 (en) |
-
1995
- 1995-10-30 JP JP28172995A patent/JP3434104B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09129399A (en) | 1997-05-16 |
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